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5.5
Master Control Instructions
Setting the master control, resetting the master control
MC, MCR
High
Basic
Process
Redundant Universal
performance
MC
MCR
n:
Nesting (N0 to N14) (Nesting)
(D): Device number to be turned ON (bits)
Setting
Internal device
data
Bit
Word
n
(D)
(Other than T, ST, C)
Processing details
• The master control instruction is used to enable the creation of highly efficient ladder switching sequence programs,
through the opening and closing of a common bus for ladders.
• A ladder using the master control is as follows:
Ladder as displayed in GPP ladder mode
X0
MC
n1
n1
M0
X1
X3 M7
M5
X6 X4
MCR
XF
Inputting of contacts on the vertical bus is not necessary when programming in the write mode of a
programming tool. These will be automatically displayed when the "conversion" operation is conducted after
the creation of the ladder and then "read" mode is set.
LCPU
Command
n
D
Master control ladder
R, ZR
J\
Bit
Word
X0
M0
n1
M0
X1
Y47
M5
Y4F
X6 X4
n1
XF
Y40
n
MC
MCR
U\G
Zn
Ladder as it actually operates
MC
n1
M0
X3 M7
Y47
Y4F
MCR
n1
Y40
5 SEQUENCE INSTRUCTIONS
5.5 Master Control Instructions
D
n
Constant
Others
N
DY
Executed
only when
X0 is ON.
5
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